Window-sash fastener



A ril 1 925.

I T. H. JACKSON WINDOW SASH FASTENER Filed May 26, 1 2

V "a W w I Patented Apr. 23, 1925.

UNITED STATES WINDOW-SASH IASTENEB.

Application filed May as,

To all whom it may concern:

Be it known that I, Trrorras H. JACKSON, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Window-Sash Fasteners, of which the following is a specification.

One object of my invention is to provide an improved fastener which can be quickly and easily attached to the sashesof a window and which will effectively lock the same and prevent the easy prying of the locked sashes.

Another objectis to so construct my improved fastener that the major portion thereof can be directly secured to the upper edge surfaces of the lower sash by ordinary wood screws and if an attempt is made to pry or jimmy the sash, the arrangement of the parts will prevent the screws from entirely pulling out of the sash.

Another object is to make my improved fastener of a strong and durable construction.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference be ing had to the accompanying drawings in which- Figure 1 is a fragmentary perspective view, partly in section. showing my i1n proved fastener in position locking two sashes together, I

Figure2 is a fragmentary sectional plan view showing my improved fastener in an unlocked position,

Figure 3 is a sectional elevation taken centrally through a portion of my improved fastener and the sash to which it is connected and showing the same in an; unlocked position,

Figure 4 is aninverted plan view of the portion of the fastener shown in Figure 3; the pivot being illustrated in section, and

Figure 5 is a sectional elevation showing how the parts of my improved fastener can act when an attempt is made either to pry the lower sash upwardly or the upper sash downwardly.

Referring to the drawings, 6 represents the lower sash and 7 represents the upper sash of a window.

My improved device includes a base 8 which may be made of cast metal which has a front flange 9 which is preferably made 1921. Serial No. 472,700.

straight; the same forming one wall of a recess 10 extending upwardly from the bottom of the base. The flange 9 is continued rearwardly as shown at 11. The base has a hollow upwardly extending portion 12 which provides a boss on its top surface; said boss being positioned inwardly from the the outer part of the flange portion 11 to provide a ledge 13. The flange 9 is continued upwardly so as to form a closure for the front of the boss 12 as clearly shown in Figure 3. The boss 12 has a downwardly extending hole 14 in which rotatably fits the trunnion 15 of a latch 16. A pivot pin 17 extends through the latch and through a washer or ring 18 which is adaptedto engage the lower surfaces of downwardly elm tending ribs 19 of said boss. The lower end of the pin 17 is preferably riveted over the washer 18; said washer being of greater diameter than the hole 14 so that the latch is pivotally secured to the base. The trunnion 15 has flat portions 20 arranged at right angles to each other for engagement with a strip spring 21 which has its ends bearing upon internal. shoulders of the boss as shown in Figure 4; it being noted that for the boss to turn, it is necessary for the angular junction of the flat surfaces 20 to engage and flex the spring 21 so that the latch can be swung in opposite directions to alternately present its flat surfaces in alignment with the spring so that the latch will not accidentally move out of the position into which it is turned.

To facilitate the movement of the latch, li provide it with a handle extension 23. The latch 16 at a position opposite the handle has a tongue 24 which slants upwardly from its end 25 in an arcuate path on its up per surface and said upper surface at the part 26 is made parallel with the bottom of the latch for apurpose hereinafter described. In other words, the tongue is only beveled at a position adjacent the end 25 but at a position such as shown at 26, the tongue at its top surface is parallel with the bottom surface. The ledge 13 has screw holes 27 which extend downwardly so that screws 28 can be inserted therethrough and screwed downwardly into the top of the bottom sash 6, as shown in Figures 1 and 3.

It will be noted that certain of these holes 27 are positioned close to the flange 9 of the base 8 and that another of the holes which is number 29 is positioned adjacent Cir the rear of the frame. A keeper plate is adapted to be screwed to the uprig; 1t surface 31 ot the top sash T and this keeper plate, if the sash are close fitting, may be inserted within the portion 31 of the top sash, as shown in Figures 1 and 5. The keeper plate has a slot 32 which registers with a cavity 33 extending horizcntal into the sash T. The keeper plate and can are so positioned that when the latcn 16 is swung on its pivot the tongue "l will pass through the slot into the rarity 333 until the portion 26 parses under the upper wall of the slot 372 with the dan e of the base ied parallel t5 positi with and directly in front of the outer surface of the keeper plate 30.

Considering that the parts are in their locked position as shown in Figure it it is attempted to pry or jimmy the lower sash upwardly or the. u per sash downwardly, the resulting tion will cause the base to tilt on the lower edge of the tlange 9 a. a fulcrum and the screw 28 through the hol 29 will be pulled wise partway out of the bottom sash. tilting action will continue until he surface of the flange 9 engages the surface of the keeper plate and the parts will then jam so as to prover t further withdrawal of the screw wl ich pasqes through the hole 29 in the boss. The other crews 28 will then receive a shearing action but in view of the fact that this action transverse or in the direction of he thickness of the screws, it will be practically impossible outer for thes latter n'ientioned screws to be broken or pulled out of the wood of the sash 6. By having the portion 26 of the upper surface of the tongue parallel with the bottom surface of the tongue, the lifting action of the lower sash or the lowering action of the top sash will not cause the latch to swing on its pivot and therefore the parts cannot he accidentally detached.

lVhilc I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without depa ting from the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make with a trunnion inovabl; secured to said base and having a locking tongue, spring means to engage said trunnion and bolt said latch in positions and a keeper niouned on the upright surface of the upper sash and having a slot for the reception of the ongue of sa ling an upid latch, said keeper il'lClUt, right surface substantiall -c parzl engr c nent with the upright. surface of said base fiange to engage the same and stop tilting of ..aid base on the lower sash and preventing withdrawal ot the SCINJS in said base.

2. A fastener including a base provided with screws for mounting it on the upper surface of the lower cash, said fastener having a flat flange with a straight upright surface, a latch with a trunnion rotatably secured in said base and having an arcuate locking tongue with a bevelled portion, a spring to engage a tlat portion on said (run nion and hold said latch in locking position and a keeper embedded in the upright surface of the upper sash and having a slot for the reception of said tongue, said keeper including an upright surface parallel with and in engagement with the upright surface of said base flange to engage the same and prevent excessive tilting of said base on said lower sash and to prevent said screws from pulling out longitudinally 'rom said lower sash or the removal of said base therefrom upon movement of the sash when the latch is in locked position.

in testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

TI-IQllifAS H. JACKSON.

1 e and in l Vitnesses CHAS. E. POTTS, ELIZABETH GARBE. 

